| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    
| 0 | 13 | 
                                                                 
                                    
                                    22%
                                 
                                                             | 
                                                        
                    |
| 1 | 6 | 
                                                                 
                                    
                                    10.2%
                                 
                                                             | 
                                                        
                    |
| 2 | 9 | 
                                                                 
                                    
                                    15.3%
                                 
                                                             | 
                                                        
                    |
| 3 | 7 | 
                                                                 
                                    
                                    11.9%
                                 
                                                             | 
                                                        
                    |
| 4 | 3 | 
                                                                 
                                    
                                    5.1%
                                 
                                                             | 
                                                        
                    |
| 5 | 2 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    |
| 6 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 7 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 8 | 4 | 
                                                                 
                                    
                                    6.8%
                                 
                                                             | 
                                                        
                    |
| 9 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 10 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 17 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 23 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 25 | 2 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    |
| 26 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 30 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 39 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 52 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| 79 | 1 | 
                                                                 
                                    
                                    1.7%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 182 |